<template>
  <div class="outerBox">
    <div class="innerBox">
      <div class="essayInfo">
        <div class="essayInfoBox">
          <div class="essayInfoBoxHeader" style="color: #76becc"><span>1320</span>篇</div>
          <div class="essayInfoBoxFooter"><span>总文章数</span></div>
        </div>
        <div class="essayInfoBox">
          <div class="essayInfoBoxHeader" style="color: #65c294"><span>1104</span>篇</div>
          <div class="essayInfoBoxFooter">日新增文章数</div>
        </div>
        <div class="essayInfoBox">
          <div class="essayInfoBoxHeader" style="color: #f173ac"><span>2300</span>条</div>
          <div class="essayInfoBoxFooter">评论总数</div>
        </div>
        <div class="essayInfoBox">
          <div class="essayInfoBoxHeader" style="color: #90d7ec"><span>2222</span>条</div>
          <div class="essayInfoBoxFooter">日新增评论数</div>
        </div>
      </div>
      <div class="chart01">
        <div class="monthOfEssay" id="monthOfEssay"></div>
        <div class="numberOfEssay" id="numberOfEssay"></div>
      </div>
      <div class="chart02">
        <div class="visitorOfEssay" id="visitorOfEssay"></div>
      </div>
    </div>
  </div>
</template>

<script>
import * as echarts from 'echarts'
import {nextTick, onMounted} from "vue";

export default {
  name: "MainPage",
  setup(){
    let del = () => {
      echarts.init(document.getElementById('monthOfEssay')).dispose()
      echarts.init(document.getElementById('numberOfEssay')).dispose()
      echarts.init(document.getElementById('visitorOfEssay')).dispose()
    }
    // 设置面积图
    let setCurveChartFn = () => {
      // 基于准备好的dom，初始化echarts实例
      let curveChart = echarts.getInstanceByDom(document.getElementById('monthOfEssay'))
      if (curveChart == null) {
        curveChart = echarts.init(document.getElementById('monthOfEssay'))
      }
      // 绘制面积图表
      // 数据源(模拟后台返回的数据)
      const aListAll = [
        { count: 36, date: '2022-04-13' },
        { count: 52, date: '2022-04-14' },
        { count: 78, date: '2022-04-15' },
        { count: 85, date: '2022-04-16' },
        { count: 65, date: '2022-04-17' },
        { count: 72, date: '2022-04-18' },
        { count: 88, date: '2022-04-19' },
        { count: 64, date: '2022-04-20' },
        { count: 72, date: '2022-04-21' },
        { count: 90, date: '2022-04-22' },
        { count: 96, date: '2022-04-23' },
        { count: 100, date: '2022-04-24' },
        { count: 102, date: '2022-04-25' },
        { count: 110, date: '2022-04-26' },
        { count: 123, date: '2022-04-27' },
        { count: 100, date: '2022-04-28' },
        { count: 132, date: '2022-04-29' },
        { count: 146, date: '2022-04-30' },
        { count: 200, date: '2022-05-01' },
        { count: 180, date: '2022-05-02' },
        { count: 163, date: '2022-05-03' },
        { count: 110, date: '2022-05-04' },
        { count: 80, date: '2022-05-05' },
        { count: 82, date: '2022-05-06' },
        { count: 70, date: '2022-05-07' },
        { count: 65, date: '2022-05-08' },
        { count: 54, date: '2022-05-09' },
        { count: 40, date: '2022-05-10' },
        { count: 45, date: '2022-05-11' },
        { count: 38, date: '2022-05-12' }
      ]

      // 但是图标要求直接给数字的值, 所以要把对象的值取出来形成2个只有值的数组
      const aCount = []
      const aDate = []

      for (let i = 0; i < aListAll.length; i++) {
        aCount.push(aListAll[i].count)
        aDate.push(aListAll[i].date)
      }

      // 面积图的echarts配置项(参考文档复制)
      const chartopt = {
        title: {
          text: '月新增文章数', // 标题
          left: 'center', // 位置居中
          top: '10' // 标题距离容器顶部px
        },
        tooltip: { // 提示框组件
          trigger: 'axis' // 坐标轴触发(鼠标放在坐标轴就能出提示框)
        },
        legend: { // 图例组件(每种颜色的意思)
          data: ['新增文章'], // 图例文字解释(要和series里name对应)
          top: '40' // 距离容器顶部px
        },
        toolbox: { // 工具栏
          show: true, // 要显示
          feature: { // 各工具配置项
            mark: { show: true }, // 辅助线开关
            dataView: { show: true, readOnly: false }, // 数据视图工具，可以展现当前图表所用的数据，编辑后可以动态更新。
            magicType: { show: true, type: ['line', 'bar'] }, // 动态类型切换
            restore: { show: true }, // 配置项还原
            saveAsImage: { show: true } // 点击保存下载图片
          }
        },
        xAxis: [ // 水平轴显示
          {
            name: '日',
            type: 'category',
            boundaryGap: false, // 坐标轴两边留白策略 (不留白)
            data: aDate // 水平轴上的数字数据 (时间)
          }
        ],
        yAxis: [ // 垂直轴显示
          {
            name: '月新增文章数',
            type: 'value' // 以series里的data值做划分段
          }
        ],
        series: [ // 系列(控制图表类型和数据)
          {
            name: '新增文章',
            type: 'line', // 折线图
            smooth: true, // 是否平滑视觉引导线，默认不平滑，可以设置成 true 平滑显示
            areaStyle: { type: 'default' }, // 区域填充样式。设置后显示成区域面积图。
            itemStyle: { color: '#f80', lineStyle: { color: '#f80' } }, // 折线拐点标志的样式。
            data: aCount // 真正数据源(用下标和x轴数组对应)
          }
        ],
        grid: { // 直角坐标系内绘图网格
          show: true,
          x: 50, // grid 组件离容器偏移量, 左侧
          x2: 50, // 右侧
          y: 80, // 上
          height: 220 // 高度
        }
      }

      curveChart.setOption(chartopt)
    }

    // 设置底部柱状图
    // 设置饼状图
    let picChartFn = () => {
      let oPie = echarts.getInstanceByDom(document.getElementById('numberOfEssay'))
      if (oPie == null) {
        oPie = echarts.init(document.getElementById('numberOfEssay'))
      }
      const oPieopt = {
        title: {
          top: 10,
          text: '分类文章数量比',
          x: 'center'
        },
        tooltip: {
          trigger: 'item', // 在图形上才会触发提示
          formatter: '{a} <br/>{b} : {c} ({d}%)' // 提示的文字显示的格式
          // a: 系列名
          // b: 数据名
          // c: 数值
          // d: 百分比 (只有饼状图生效)
        },
        color: ['#5885e8', '#13cfd5', '#00ce68', '#ff9565'], // 系列颜色
        legend: { // 图例组件
          x: 'center',
          top: 65,
          data: ['奇趣事', '会生活', '爱旅行', '趣美味'] // 每个部分对应的数据名(要和series里name对应)
        },
        toolbox: { // 工具箱
          show: true,
          x: 'center',
          top: 35,
          feature: {
            mark: { show: true },
            dataView: { show: true, readOnly: false },
            magicType: {
              show: true,
              type: ['pie', 'funnel'],
              option: {
                funnel: {
                  x: '25%',
                  width: '50%',
                  funnelAlign: 'left',
                  max: 1548
                }
              }
            },
            restore: { show: true },
            saveAsImage: { show: true }
          }
        },
        series: [
          {
            name: '访问来源',
            type: 'pie',
            radius: ['45%', '60%'],
            center: ['50%', '65%'],
            data: [
              { value: 300, name: '奇趣事' },
              { value: 100, name: '会生活' },
              { value: 260, name: '爱旅行' },
              { value: 180, name: '趣美味' }
            ]
          }
        ]
      }
      oPie.setOption(oPieopt)
    }

    // 设置底部柱状图
    let columnChartFn = () => {
      let oColumn = echarts.getInstanceByDom(document.getElementById('visitorOfEssay'))
      if (oColumn == null) {
        oColumn = echarts.init(document.getElementById('visitorOfEssay'))
      }
      const oColumnopt = {
        title: {
          text: '文章访问量',
          left: 'center',
          top: '10'
        },
        tooltip: {
          trigger: 'axis'
        },
        legend: {
          data: ['奇趣事', '会生活', '爱旅行', '趣美味'],
          top: '40'
        },
        toolbox: {
          show: true,
          feature: {
            mark: { show: true },
            dataView: { show: true, readOnly: false },
            magicType: { show: true, type: ['line', 'bar'] },
            restore: { show: true },
            saveAsImage: { show: true }
          }
        },
        xAxis: [
          {
            type: 'category',
            data: ['1月', '2月', '3月', '4月', '5月']
          }
        ],
        yAxis: [
          {
            name: '访问量',
            type: 'value'
          }
        ],
        series: [
          {
            name: '奇趣事',
            type: 'bar',
            barWidth: 20,
            areaStyle: { type: 'default' },
            itemStyle: {
              color: '#fd956a'
            },
            data: [800, 708, 920, 1090, 1200]
          },
          {
            name: '会生活',
            type: 'bar',
            barWidth: 20,
            areaStyle: { type: 'default' },
            itemStyle: {
              color: '#2bb6db'
            },
            data: [400, 468, 520, 690, 800]
          },
          {
            name: '爱旅行',
            type: 'bar',
            barWidth: 20,
            areaStyle: { type: 'default' },
            itemStyle: {
              color: '#13cfd5'
            },
            data: [500, 668, 520, 790, 900]
          },
          {
            name: '趣美味',
            type: 'bar',
            barWidth: 20,
            areaStyle: { type: 'default' },
            itemStyle: {
              color: '#00ce68'
            },
            data: [600, 508, 720, 890, 1000]
          }
        ],
        grid: {
          show: true,
          x: 50,
          x2: 30,
          y: 80,
          height: 260
        },
        dataZoom: [ // 给x轴设置滚动条
          {
            start: 0, // 默认为0
            end: 100 - 1000 / 31, // 默认为100
            type: 'slider',
            show: true,
            xAxisIndex: [0],
            handleSize: 0, // 滑动条的 左右2个滑动条的大小
            height: 8, // 组件高度
            left: 45, // 左边的距离
            right: 50, // 右边的距离
            bottom: 26, // 右边的距离
            handleColor: '#ddd', // h滑动图标的颜色
            handleStyle: {
              borderColor: '#cacaca',
              borderWidth: '1',
              shadowBlur: 2,
              background: '#ddd',
              shadowColor: '#ddd'
            }
          }
        ]
      }
      oColumn.setOption(oColumnopt)
    }

    onMounted(() => {
         nextTick(() =>{
           del()
           columnChartFn()
           picChartFn()
           setCurveChartFn()
         })
    })


    return{
      columnChartFn,
      picChartFn,
      setCurveChartFn
    }
  }
}
</script>

<style scoped>
*{
  padding: 0;
  margin: 0;
}
.outerBox{
  width: 100%;
  height: 500px;
  box-sizing: border-box;
}
.innerBox{
  width: 98%;
  height: 100%;
  margin: 20px auto;
}
.essayInfo{
  display: flex;
  flex-direction: row;
  justify-content: space-between;
}
.essayInfoBox{
  height: 10%;
  width: 24%;
  background-color: white;
}
.essayInfoBoxHeader, .essayInfoBoxFooter{
  width: 100%;
}
.essayInfoBoxHeader{
  height: 70%;
  line-height: 105px;
  text-align: center;

}
.essayInfoBoxFooter{
  height: 30%;
  background-color: #E4E7ED;
  line-height: 45px;
  text-align: center;
}
.essayInfoBoxHeader span{
  font-size: 40px;
  font-weight: bold;
}
.chart01{
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  width: 100%;
  margin-top: 15px;
}
.monthOfEssay{
  width: 69%;
  height: 400px;
  background-color: white;
}
.numberOfEssay{
  width: 30%;
  height: 400px;
  background-color: white;
}
.chart02{
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  width: 100%;
  margin-top: 15px;
}
.visitorOfEssay{
  width: 100%;
  height: 400px;
  background-color: white;
}
</style>
